Cleveland C55126 Hand Tap 3/8-24 Unf Plug Tin Hss

Product Description

The CLEVELAND C55126 is a straight-flute hand tap designed for threading 3/8-24 UNF holes in metalworking applications. Built from high speed steel with a titanium nitride (TiN) coating, it delivers extended tool life and reduced friction during tapping operations. The plug chamfer style features a 3-5 thread lead-in, making it suitable for both through-hole and blind-hole threading. With 4 flutes, a 2-15/16 inch overall length, and a 1-1/4 inch thread length, this tap is sized for standard hand tapping setups in job shop and maintenance machining environments. Thread class of fit is 3B with an H3 thread limit for controlled tolerance.

This tap is used in manual tapping operations across a range of industries including general fabrication, maintenance and repair, and precision machining. It is rated for blind hole and through-hole threading in alloy steel, carbon steel, aluminum, and free-machining stainless steel. The TiN coating provides surface hardness that extends service life when cutting harder ferrous materials. The straight flute geometry is appropriate for through-hole work and short-chip materials. This is a Series 1002TN tap from Cleveland, intended for use with a standard tap wrench or tapping fixture.

Key Features

• TiN coating reduces friction and extends tool life compared to uncoated high speed steel
• Plug chamfer provides 3-5 thread lead-in for easy starting in both blind and through holes
• H3 thread limit with 3B class of fit for controlled UNF thread tolerance
• 4-flute straight flute design suited for short-chip materials and through-hole applications
• Right-hand thread direction, 3/8-24 UNF thread size
• Series 1002TN construction with 0.318 inch shank diameter

Compatibility

Rated for use in alloy steel, carbon steel, aluminum, and free-machining stainless steel. Suitable for blind hole and through-hole threading applications requiring a 3/8-24 UNF thread form.

Installation Notes

Hand tapping should be performed by a machinist or qualified tradesperson using a properly sized tap wrench. Ensure the workpiece is securely fixtured and the tap is started perpendicular to the hole to avoid thread misalignment. Apply cutting fluid appropriate for the workpiece material before and during the tapping operation. Back the tap off periodically to break chips, especially in blind hole applications.